Neutrino Oscillation Measurements Computed in Quantum Field Theory

Understand

We perform a calculation in quantum field theory of neutrino oscillation probabilities, where we include simultaneously the source, detector, and neutrino fields in the Hamiltonian.

• Within the appropriate limits associated with current neutrino oscillation experiments, we recover the standard oscillation formula.
• On the other hand, we find that the dominant contributions to the amplitude are associated with different neutrino mass eigenstates being emitted at different times, such that they arrive at the detector at the same time.
• This is contrary to the neutrino wave packet picture, where they are emitted simultaneously and separate as they travel to the detector.